refactor(smart module): rationalize smart-module dependencies (#2579)

To simplify SmartModule-related infrastructure, the following changes are made:
* Remove `fluvio-dataplane-protocol` crate.   Parts of the crates were moved to `fluvio-protocol` with a feature flag.
* API-related codes are moved to `fluvio-spu-schema` crate.
* SmartModule specific codes are moved to `fluvio-smaretmodule` crate.
* Engine-related codes are moved to `fluvio-smartengine.`

Both `fluvio-smartmodule` and `fluvio-smartengine` have feature flags with no default features.   No default feature-based code is intended to be shared with other crates.   This makes it easier to co-locate code based on the use case.

These changes reduce internal dependencies, which reduce coupling between crates and make it easier to maintain codes.

.github/workflows/ci.yml

@@ -117,6 +117,7 @@ jobs:
     if: github.event_name == 'push' && github.ref == 'refs/heads/staging'
     runs-on: ${{ matrix.os }}
     strategy:
+  #    fail-fast: false
       matrix:
         rust-target:
           - aarch64-apple-darwin
@@ -350,7 +351,6 @@ jobs:
           - fluvio-protocol
           - fluvio-spu-schema
           - fluvio-sc-schema
-          - fluvio-dataplane-protocol
           - fluvio-types
     env:
       RUST_BACKTRACE: full
@@ -384,7 +384,6 @@ jobs:
           - fluvio-sc-schema
           - fluvio-protocol
           - fluvio-spu-schema
-          - fluvio-dataplane-protocol
           - fluvio-types
         features:
           - no-default-features